Powertrain
generic / SAE
P2516
A/C Refrigerant Pressure Sensor B Circuit Range/Performance
A/C refrigerant pressure sensor B is electrically intact, but its reading does not match the system model — for example pressures that do not fall when the compressor is off, do not change with ambient temperature, or contradict pressure sensor A. Often a refrigerant charge issue or a contaminated sensor.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 16
Possible causes
- Low refrigerant charge high
- Contaminated or aged sensor diaphragm medium
- Sensor element aged beyond calibration window low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–600 €
- Estimated time: 0.5–2 h
- Component: ac pressure sensor b
- Component: refrigerant charge
- MIL / check engine light
Sources
References
sae:J2012